Granted Patent
Utility
US 4,351,550 · App. 06/132,875
Metal-to-plastic pipe joint
Inventors:
David L. Anderson, A. David Joseph
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: Mar 24, 1980
Inventors
David L. Anderson
A. David Joseph
Assignee (at issue)
Sealed Power Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.